New Sitting Bull Cabin Photo

Still following the trail of Sitting Bull's log cabin, I purchased the following photos on eBay. They have no information with them other then they were obviously taken at the 1893 Colombian Exposition. 

Although they were included together, the cabin on the right is not Sitting Bull's. The photo of the cabin below was taken at the fair and included in the book Halligan's Illustrated World's Fair. The left hand photo above was taken outside the cabin enclosure. The roof of the cabin and tipi pictured above mirror those in the photo below. Also, the artwork in the above photo, vaguely visible above the sign advertising the cabin is clearly visible in other photos of the enclosure. To my knowledge, the photo below is the only one taken of the cabin inside the enclosure during the fair.

 

The fair was filled with various cabins including one of Abraham Lincoln's that was transported to the fair and one constructed by Teddy Roosevelt and his Boone and Crockett Club. Photos of each of these make clear that the one in the photo above is something else. I have found references to a "Uncle Tom's Cabin" being at the fair and there are references to several others. Which one is this? The key may be identifying the seemingly modern looking building sitting behind it or locating another photograph somewhere in the archives. The search continues.